Part # AD7225 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7225 LC2MOS Quad 8-Bit DAC with Separate Reference Inputs


Part Details:

a LC2MOS Quad 8-Bit DAC with Separate Reference Inputs AD7225 FEATURES FUNCTIONAL BLOCK DIAGRAM Four 8-Bit DACs with Output AmplifiersSeparate Reference Input for Each DAC P Compatible with Double-Buffered Inputs Simultaneous Update of All Four OutputsOperates with Single or Dual SuppliesExtended Temperature Range OperationNo User Trims RequiredSkinny 24-Pin DIP, SOIC and 28-Terminal Surface Mount Packages GENERAL DESCRIPTIONThe AD7225 contains four 8-bit voltage output digital-to-analog converters, with output buffer amplifiers and interfacelogic on a single monolithic chip. Each D/A converter has a PRODUCT HIGHLIGHTS separate reference input terminal. No external trims are re- 1. DACs and Amplifiers on CMOS Chip quired to achieve full specified performance for the part. The single-chip design of four 8-bit DACs and amplifiers al- The double-buffered interface logic consists of two 8-bit regis- lows a dramatic reduction in board space requirements and ters per channel­an input register and a DAC register. Control offers increased reliability in systems using multiple convert- inputs A0 and A1 determine which input register is loaded when ers. Its pinout is aimed at optimizing board layout with all WR goes low. Only the data held in the DAC registers deter- analog inputs and outputs at one end of the package and all mines the analog outputs of the converters. The double- digital inputs at the other. buffering allows simultaneous update of all four outputs under 2. Single or Dual Supply Operation control of LDAC. All logic inputs are TTL and CMOS (5 V) The voltage-mode configuration of the AD7225 allows single level compatible and the control logic is speed compatible with supply operation. The part can also be operated with dual most 8-bit microprocessors. supplies giving enhanced performance for some parameters. Specified performance is guaranteed for input reference voltages 3. Versatile Interface Logic from +2 V to +12.5 V when using dual supplies. The part is also The AD7225 has a common 8-bit data bus with individual specified for single supply operation using a reference of +10 V. DAC latches, providing a versatile control architecture for Each output buffer amplifier is capable of developing +10 V simple interface to microprocessors. The double-buffered in- across a 2 k load. terface allows simultaneous update of the four outputs. The AD7225 is fabricated on an all ion-implanted high-speed 4. Separate Reference Input for Each DAC Linear Compatible CMOS (LC2MOS) process which has been The AD7225 offers great flexibility in dealing with input sig- specifically developed to integrate high speed digital logic cir- nals with a separate reference input provided for each DAC cuits and precision analog circuitry on the same chip. and each reference having variable input voltage capability. REV. B Information furnished by Analog Devices is believed to be accurate andreliable. However, no responsibility is assumed by Analog Devices for itsuse, nor for any infringements of patents or other rights of third partieswhich may result from its use. No license is granted by implication or One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.


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AD7225.pdf Datasheet